We're talking about the Mother caravan. After taking pride of place in the window of the agency's St John Street home, the cream and green Mayfly that doubled as a meeting room has finally met its maker.
To mark its passing, 400 two-by- two-inch square sections were cut from the dismantled caravan and distributed to friends, well-wishers and relatives.
Among the chunks that winged their way to the Campaign offices were, what we can imagine to be the corner of a Perspex window, a floor tile and what appears to be part of the inside wall or some part of the chemical toilet.
The poor Mayfly's demise coincides with Mother's relocation, last week, to bigger premises in Shoreditch, in London's East End.
Nestled between Whitechapel and Bethnal Green, Redchurch Road, E2, does not possess the most salubrious postcode in the capital. In short, it's the kind of place where a knackered old caravan would blend into the surroundings.
So quite why Mother decided it should not make the journey remains a mystery.
Unless, that is, they plan to replace it with a burnt-out Sierra Cosworth.